131,188 research outputs found

    Assessing Radon-in-air from streamflow, comparing two study cases: Labso-Laura and Capodifiume springs (Campania region, southern Italy)

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    This paper deals with a particular kind of radon-in-air Springs: the degassing from spring and related channels in a rural and urban landscape. The two study areas are located, the first, at the Cilento Geopark Geosite of Capodifiume spring group and, the second, in the Montoro alluvial plain (southern Italy). Based on previous hydro-geological studies, field measurements campaigns have been carried out during the 2013 spring-autumn time on monitoring stations located along springs and downstream irrigation channels. Laboratory analysis and environmental calculations have yet provided insight on space-time radon distribution in spring and stream flow, confirming radon as effective tracer in hydro-geomorphological analysis. Beside this, field experiments on radon-in-air concentration and diffusion by radon degassing from the surface flowing water have been performed in order to define influenced areas by radon diffusion. Results give effective insights in radon risk assessment for urban planning and radon mitigation actions

    Going Beyond Counting First Authors in Author Co-citation Analysis

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    The present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed

    Guida Museo del Paesaggio

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    Si tratta della Guida del Mueo del Paesaggio di Castelnuovo B.ga (Siena) di cui gli autori sono stati i curatori scientifici nel 1999. La guida include parti teoriche sul concetto di paesaggio e la descrizione critica e ragionata dei documenti esposti nel Museo. Si tratta di un'esperienza unica in Europa. Il museo è classificato come museo scientific

    Guida di Padova e della sua provincia - Mappe.

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    Pianta della città di Padova realizzata da Giovanni Antonio Rizzi Zannoni e mappa della provincia di Padova e dei territori limitrofi, opera di Luigi Patella. Entrambe sono contenute (ripiegate) in una guida alla città e alla sua provincia pubblicata in occasione della Quarta riunione degli scienziati italiani, tenutasi a Padova nel 1842. Esemplare numerato e con dedica manoscritta del Podestà G. B. Valvasori. La versione completa dell\u27opera, ma senza le due tavole, è disponibile su Google Books all\u27indirizzo https://books.google.it/books?id=XwUFSxk60zkC&printsec=frontcover&dq=Guida+di+padova+e+della+sua+provincia&hl=it&sa=X&ved=0ahUKEwjm4eG21tzNAhXIXhQKHRlGCZgQ6AEIJzAA#v=onepage&q=Guida%20di%20padova%20e%20della%20sua%20provincia&f=falsePianta della città di Padova realizzata da Giovanni Antonio Rizzi Zannoni e mappa della provincia di Padova e dei territori limitrofi, opera di Luigi Patella. Entrambe sono contenute (ripiegate) in una guida alla città e alla sua provincia pubblicata in occasione della Quarta riunione degli scienziati italiani, tenutasi a Padova nel 1842. Esemplare numerato e con dedica manoscritta del Podestà G. B. Valvasori. La versione completa dell\u27opera, ma senza le due tavole, è disponibile su Google Books all\u27indirizzo https://books.google.it/books?id=XwUFSxk60zkC&printsec=frontcover&dq=Guida+di+padova+e+della+sua+provincia&hl=it&sa=X&ved=0ahUKEwjm4eG21tzNAhXIXhQKHRlGCZgQ6AEIJzAA#v=onepage&q=Guida%20di%20padova%20e%20della%20sua%20provincia&f=fals

    Dispelling the Myths Behind First-author Citation Counts

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    We conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more sophisticated methods

    Assessing Radon in the karst spring waters: the case-study of the Capodifiume spring mixed waters, National Park of the Cilento, Vallo di Diano and Alburni-European Geopark (Southern Italy)

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    Based on the results of previous geological, hydrogeological and geomorphological surveys, hydrochemical and isotopic tracer techniques have been applied for investigating the origin of significantly elevated Radon (222Rn) activity concentrations detected at the highly NaCl / CaCO3 mineralized Capodifiume karst spring group, located near the archaeological site of Poseidon-Paestum, Southern Italy. Compared to other karst springs in the Cilento and Vallo di Diano Geopark both Radon concentration and salinity show remarkably high values as well as a good correlation. Latest Trends in Energy, Environment and Development ISBN: 978-960-474-375-9 50 Radon concentrations range between 367±20 and 111±8 Bq/l with an average of 230 Bq/l. The high Radon levels of the spring water can neither be explained by the composition of the karst aquifer rocks or the attached travertine deposits (limestone and dolomite), which both show low Radium (226Ra) concentrations, nor by the dissolved Radium content of the spring water. In order to explain the contemporary high levels both of Radon and salinity, several measurement campaigns were carried out and collected data were analyzed, considering the Radon and Electrical Conductivity and Temperature, as useful parameters to differentiate between groundwater of different origin. Results suggest the presence of two different groundwater fluxes at Capodifiume springs originating from different karst aquifer. In fact the similar behavior of the three parameters in the area can be explained by the mixing of different kinds of groundwater. Considering the correlation and the similar behavior of Radon activity concentration, electrical conductivity and temperature, two different groundwater fluxes have been individuated. A different hydro-geological origin and pathway could be assumed to explain their characteristics. This is a first step of a future investigation that will focus on a quantitative analysis and assessment of the groundwater mixing at Capodifiume springs
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